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shakes the resolve of the united states of america. >> earlier today secretary of state hillary clinton stepped up her criticism of the anti-muslim film that first prompted the protests. >> to us, to me personally, this video is disgusting and reprehensib reprehensible. it appears to have a deeply cynical purpose to denigrate a great religion and to provoke rage. >> joining me now live from cairo, nbc's similar maceda. give us the best description of how things are right now. >> reporter: well, ironically benghazi remained calm today. if you look at it, perhaps the libyan government's quick crackdown there on those alleged perpetrators. four individuals were arrested today. there's a manhunt going on that might have had a tamping-down effort. even there in benghazi, the u.s. government is taking no chances. we understand that all u.s. personnel has now been or have been evacuated to tripoli and only emergency staff are kept at the embassy here. here in cairo it's another 24 hours of protests against that made in usa anti-islam film. overnight last night some dramatic scenes near the u.s
. earlier this year iran threatened to close the strait of hormuz. the united states drew a clear red line, and iran backed off. now, red lines could be drawn in different parts of iran's nuclear weapons program. to be credible a red line must be drawn first and foremost in one vital part of their program. on iran's efforts to enrich uranium. now, let me explain why. basically any bomb consists of explosive material and a mechanism to ignite it. the simplest example is gunpowder and a fuse. that is you light the fuse, and you set off the gunpowder. in the case of iran's plans to build a nuclear weapon, the gunpowder is enriched uranium. the fuse is a nuclear detonator. for iran amassing enough enriched uranium is far more difficult than producing the nuclear fuse. for a country like iran, it takes many, many years to enrich uranium for a bomb. that requires thousands of centrifuges spinning in tandem in big, very big industrial plants. those iranian plants are visible, and they're still vulnerable. in contrast, iran could produce the nuclear detonator, the fuse, in a lot less time. maybe u
Search Results 0 to 3 of about 4 (some duplicates have been removed)